Plastic clamp



FIG. 1 is a perspective view of a plastic clamp showing my new design in its closed clamping position;

FIG. 2 is a front end elevational view thereof;

FIG. 3 is a rear end elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a side elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a side elevational view thereof in its open position. 

The ornamental design for a plastic clamp, as shown and described. 